From 6af7618b2378a3af378d681914976483b5b60c36 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Fri, 30 Jan 2009 20:50:00 +0000 Subject: [PATCH] Perform obvious constant arithmetic folding. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63417 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index e507b893bc2..d639ec018e1 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -485,9 +485,10 @@ SDValue DAGCombiner::ReassociateOps(unsigned Opc, DebugLoc DL, if (N0.getOpcode() == Opc && isa(N0.getOperand(1))) { if (isa(N1)) { // reassoc. (op (op x, c1), c2) -> (op x, (op c1, c2)) - SDValue OpNode = DAG.getNode(Opc, N1.getDebugLoc(), VT, - N0.getOperand(1), N1); - AddToWorkList(OpNode.getNode()); + SDValue OpNode = + DAG.FoldConstantArithmetic(Opc, VT, + cast(N0.getOperand(1)), + cast(N1)); return DAG.getNode(Opc, DL, VT, N0.getOperand(0), OpNode); } else if (N0.hasOneUse()) { // reassoc. (op (op x, c1), y) -> (op (op x, y), c1) iff x+c1 has one use @@ -501,9 +502,10 @@ SDValue DAGCombiner::ReassociateOps(unsigned Opc, DebugLoc DL, if (N1.getOpcode() == Opc && isa(N1.getOperand(1))) { if (isa(N0)) { // reassoc. (op c2, (op x, c1)) -> (op x, (op c1, c2)) - SDValue OpNode = DAG.getNode(Opc, N1.getDebugLoc(), VT, - N1.getOperand(1), N0); - AddToWorkList(OpNode.getNode()); + SDValue OpNode = + DAG.FoldConstantArithmetic(Opc, VT, + cast(N1.getOperand(1)), + cast(N0)); return DAG.getNode(Opc, DL, VT, N1.getOperand(0), OpNode); } else if (N1.hasOneUse()) { // reassoc. (op y, (op x, c1)) -> (op (op x, y), c1) iff x+c1 has one use